Sorry dude, my german-fu is not strong..
and i think i have to register at the other forum to see a picture..
Frage 1 - Mehrspur-Audiointerface?
Yes, if you want multi-track recording.. you need an interface with allot of INPUT and OUTPUT.
and you need some multitrack recording software on your pc (think of cubase/sony acid/reaper/presonus one/sonar)
Frage 2 - Harddiscrekorder?:
I got one, a vs2400.. its awesome.. but.. its OLDSKOOL.. computers are more efficient.
besides, there almost as expansive as a brandnew pc with an interface card on it..
so, there is no reason to use hdd-recorder unless you find one.. (computer is cheaper/better)
Frage 3 - Mixer mit USB 2.0 Übertragung:
Most of these mixers, only put the main-out on the usb-bus.. so its "stereo recording"
instead of multi-channel recording.. So, read the manual before buy.. it can be cheaper then a seperate interface and a mixer.. but.. hmm i prefer a nice mixer, and a nice seperate interface for this stuff..
Insgesamt gilt:
Also ich such jetzt nicht die zig Tausend EUR Megastudio Lösungen sondern sozusagen die trickreichen billigen Sachen!
If this means.. i dont want to spend allot of money.. sell your hardware and do everything in software... hehehe.. hardware is always more expensive.. and hardware wants more hardware.. computers just need to be replaced every X year.. or just add another vst
And yes, computers come with latency.. and midi jitter and crashes.. and instability
and you have to figure out how to set them up propperly.. (which can be a pain)
Anyways, I hope you can read this easier then i could read the german stuff..
and i hope it helps you out a bit.. but not sure..
Enjoy